I'm currently selling the 221k I found a couple of weeks ago on FLEbay right now. Its a 1957 221k in excellent condition and its sitting at $240 with 6 hours to go. I started the auction at $99 and got a lot of people watching right away. Most people have a minimum starting bid of $250 for machines in this condition, but I'm not sure those auctions are actually getting any bidders. People like it when auctions start low. I know I do.
I'm only posting this as the initial question to this topic is, how much for a 221. Right now, with the current demand, I think they are around the $280-$300 mark for good quality ones. But I can post what it went for when the auction is done. I do think that actual real auctions on Flebay do reflect current demand.