Posts: 1,322
Threads: 115
Joined: Jul 2005
Jonny;
No one really knows for sure. Local and in person means more to the buyer because it is a for sure deal, high price and ease of money transfer are important to you. The saying goes that it's worth what it sells for, and that changes daily. It's too bad you just can't do it openly on this forum with the guy or girl offering the most getting it. All that said: Dave Hicks who runs the Forum has listed three Mint In Box 15C transactions for between $306 and $455. No telling when those sales were and what the inflation vs. economic downturn factor would be. Calculators are going for a bit lower today than they were 3 years ago (fewer/lower bidders) but what do i know.
The 15 is one of the Holy Trinity of HP calculators that working people still really use fairly commonly. The sealed one may get put in a glass case but the last on your list might get used by someone crunching numbers on a daily basis.
You mentioned not being a numbers guy. You might consider keeping one of these or buying a cheaper RPN programmable with your "ill-gotten-gains" anyway. A 15c, 41 or 42 will effectively raise your IQ about 20 points, unless you work in finance. Then of course; there's no hope. The 34s that folks here invented and that you make from 3 different sources is very impressive. They are all dam nice tools.
Thanks for recognizing these jewels and not just throwing them away.