I'm not buying anywhere near as much as I used to, even Spitfires, but I have acquired these few bits and pieces largely off ebay:
Ventura Spitfire HFVII
Ventura Spitfire PRXI
Ventura Seafire F.XV "Sting Hook" - quite happy to get this as I only have the one in the stash.
AZ Spitfire Vb
AZ Spitfire mk IX
These were bought as part started, the latter may well end up at Telford as a mk XVIe, depending on how much work needs doing to it.
Best of all:
Airkit Seafire XV
Cost: £4 Postage from the US £19!!!!!
And a mate donated a Quickboost Spitfire Vb Rotol prop.