The market on these does fluctuate hugely,
Somewhere around the £400 mark would be a good start you may get more as boxed and if someone want's the Rink, I've seen the 103's make more especially the nice coloured one's where cased examples can go over £650
The 102 should fall somewhere between the FWB100 (normally around £300 ish) and the highly sought after 103's, all versions were superb pistols imo.