[imported_Yankovic]

This won't stop someone from setting a ridiculous price on an item in their vendor to use it as a bank though. Someone won't suddenly buy that 99999999gp sup vanq bard because the vendor gets 5%.

The drawback to this suggestion is that it drives up the price on everything for the purchaser. Here's why; someone selling a set of xtreme armor for 100k won't leave it at 100k, they'll boost the price so that after the vendor gets his 5% cut the player still gets 100k for it. The same applies for all other items, the player selling the item won't take this 5% cut from their profits, they'll just increase the price.

Isnt that what I said? They will increase the price yes. But what is 5000 gold over 100000 gold? If someone is really interested in that xtreme armor then that someone will buy it if its 100000 gold or 105000. But you wont bank stuff for a million because that costs much more (unless you want it sold). You can bank your equipment for a million once (which costs 50k). But not everyday.