No, but for some reason you do get 2 different prices, 4200 and 2100. I ransacked a Beak thing nest other day and had these two prices, though couldn't discern a reason why.

Items with the Stolen tag sell for half of their normal selling price. Pretty sure this is vanilla behavior.

areas that have an abundance of things buy those things for less. so harvesting skinner teeth will sell for like 10 cats in heft, but 30 in places without skinners or skin spiders which have the same type of teeth. for max profit you have to take it to an area that does not have beak things.

There is a similar behavior in vanilla, which is shown at the bottom of the text box when you hover over an item in a shop. It's shown in a percentage. Cactus run will sell for less than 100% in the desert but more in the swamps I think.

UWE amplifies the effect by taking advantage of the -50% system for selling things to fences. The UWE price change is shown by the "buy/sell" price lines as (-xx%) just like when you hover over something from the shinobi fence.