Lmao. People are dumb. They are probably buying it for their daughter or something and don't wanna spend that much. Someone will come along and appreciate it. If all else fails you can try eBay and start the bidding at 100
Lol ^^^ I was about to say try eBay :)
Though of course you don't have to take less than you want to take, usually when people are buying something used, they expect to pay about half retail. Not that the people who offered you 30, 40 or 50 are justified, but remember that they are just asking and bargaining, the way someone would do at a bazaar. Sorry they were rude.
If you do put it up at eBay, you'll get a clear idea of its actual present value in the marketplace. If you begin it low, and people think it is worth more, they will try to outbid each other. If they don't, well that is what it is worth right now. But you don't have to sell it if you think it's worth more, you can wait.
You can sell it on eBay list it at 80 and go from there. I see it all the time and I'm an eBay queen!!!