This dwarf is too professional to let his eyebrows go way up. "If you'll have a seat just over there someone will be with you shortly."

They can do that! (Or, well, Zan will sit, Luto will pace, and Umakhi will find a wall she can lean on while she reads, since her wings make most chairs inconvenient.)

There is an end table she could sit on like a stool if she wanted to but they will certainly not say this aloud.

A dwarf eventually appears to welcome them into a nice office decorated in gold leaf and malachite with a rug to match. He has in the intervening time sourced a dedicated stool to accompany the normal chairs that face his desk.

(Oh, that's lucky, there's a stool in here!)

Zan smiles, bows, and politely introduces herself as a foreign adventurer.

Yes he can see that. "Welcome, I'm Fiducia Plaingrip. Have you managed a transaction like this with us before?"

She shakes her head. "We've worked with the Church of Abadar before in a few different cities, but it was always in different contexts - buying Truthtellings, getting contracts vetted, and as a funding aggregator and loan provider." 

"If you'd like me to pull our records on your party from our sister churches at other locations I can have that done to inform rates and other details at this time given whatever name or party brand identity you'd be listed under. Since of course you can sell us items without being previously known to us or while incognito this will not adversely affect your bargaining position."

Huh, what name did they use -

"It was Vakt's Vapid Vesponse Veam." (This is Ridaya's fault, obviously - she'd been the one to fill out the paperwork, the first time they worked with the church.)

This dwarf, also, is too professional to have a facial expression about that. He'll drop a little note to this effect through a slot in his office wall. "That will take just a few minutes. In the meantime, what is there to know about the item?"

Zan is of course capable of suppressing both the laughter and grief welling up inside of her.

"It's an Anarchic Unholy Speed Longsword." She pauses to let that sink in for a bit. "As such, in its current form it is a tool that can only be used by our enemies. We want to sell it to someone making a credible promise to either disassemble it for spellsilver or repurpose the Unholy enchantment into something else."

"Interesting. Well, you have come to the right place, that is certainly the kind of thing we're equipped to retain suitable craftsdwarves for. Placing conditions on the disposition of the item will of course slightly reduce its value to us but in the present market with the selected condition not by very much." He has an abacus with green and black glass beads, and does some quick calculations about that.

"Excellent." Zan smiles at him and waits for him to do math.

Eventually he has a result - "Are you going to want this in local currency, or a variety popular elsewhere, or a writ, or in some other commodity? It does marginally affect how much I can offer you."

She consults with the winged half-elf briefly.

"We want about thirty thousand kingsblood and are flexible on the rest."

In that case he is going to recommend taking the rest in a writ - it leaves the bank branch more liquid, it's easier to carry, and they can secure it in ways other than Simply Not Getting Robbed - and can present them with a tidy little contract written up for the conditional sale of the item in exchange for thus and such consideration.

A writ for the rest is fine! 

She reads over the contract and finds no problems, because of course she doesn't. Then she hands it Umakhi.

Umakhi asks some questions in a way that clearly indicates she's read a lot of contract law (and also some Abadaran philosophy, which is not exactly dissimilar). She is in particular interested in when they'll get their payment, the list of people allowed to cash the writ in with identity verification (it should be these five names), and if the church is willing to provide proof of the sword's destruction or repurposement, and if so, what that would look like.

They can for a fee allow a party member or representative to supervise the initial steps of the sword's rearrangement (the fee is because this limits their selection of craftsdwarves at least in theory and slightly inconveniences those schedulingwise). They can hand over the payment simultaneously with the handoff of the (verified by the Church to be as described) sword. They can certainly get those five names all permitted to draw on or entirely cash in the writ with their identities as the relevant parties named, here's the standard clause about them having full continuity of identity in case somebody walks in Dominated or a ghoul or whatever -

Oh. Yeah. That seems useful. Good idea.

...and if that buttons that up they can all sign here and here and here.

Yeah, they can sign. (She puts a stabilizing hand on Uma's shoulder.)