This may be semantics, but in my view, it is only worth what I "want" to pay, not whether I am "prepared" to pay the price on offer. If you pay the asking price, then that is what it is worth. However, if I do not accept the price, then it isn't worth the asking price and I will look elsewhere until I find a price I am prepared to pay. If that means I have to venture offshore to find it, then so be it. I have walked away from buying certain items because I simply couldn't see the value in the asking price. It is usually an item I may want, but actually don't need.
What things are actually worth are based on a persons needs and wants. Any particular item may have different perceived value to different people. For instance a Ford 351 Phase 3 is supposedly worth $200,000, but it certainly isn't worth that amount to me. I simply would never actually want one, after all, my modern car is just as fast and a lot more comfortable. The only value to me would be pose value, and what is that worth? Maybe around $5,000.
I am reminded by the some the valueless things that have appeared on eBay, over the years, and gone for really stupid prices, like a piece of Nutrigrain that just happened to look like ET or a piece of toast that had the likeness of the virgin mary on it. A ridiculous price was paid for them, assuming that they weren't actually a hoax. But it illustrates my point.
If you buy a brand new item and immediately sell it, then you will find out what it is really worth. Which is why I rarely sell any of my astro gear, because I simply cannot get my money back, because it isn't worth that to someone else, so I keep it instead.