Nah I aint got a 3210, got a fair few really old phones at me dads, I think I have a battered not working 3210 but not one that works lol.
If its in full working order and good condition, original Nokia covers etc, they can fetch upto about £30 a piece from a collector.
I wouldnt pay that though, id wait for one to come up on eBay. But in years to come the 3210 will be a collectable imho, its already classed as a "classic" lol.
Gooduns to have from the 2G digital era iirc are the likes of the Ericsson R38, T28/T28 World, Nokia 7110, 6310 and 8310, original 8850/8890.
Also, older and rare phones like the 8855 and 8250 fetch a fair amount still.
Gotta be in mint condition though.
I nearly had a Siemens S11, brand new in box and wrapping, for £5.00 a few months ago, but forgot to bid and went out to buy me camera as the auction was ending
The Nokia 8110 is a phone to have... that was the matrix phone and can fetch stupid money given the right person buying it hehe.