On dear... I still have seventeen, although six of them are either sets of parts, or need some work to finish their builds- not that that makes it any better!
Presently two Brinkmanns- a Bardo and a La Grange- two Linns, a Roksan Xerxes 10, a Salvation/ T3, a TD124, two TD150s, two Systemdek IIIs, a renovated Townshend Rock 2/ Excalibur (thanks Matt!), a Rega P8, a set of parts to build another bitza Rega, including a Delrin platter and a 24v motor, a modified and renovated Lenco L75 (thanks Ant!), a Technics SL1210GR, and a rebuilt SP10 Mk2 (thanks Angus!).
Tonearms not already mentioned with decks include an 80s SME V, two Supatrac Blackbirds, a (Bicht) Mission 774, a Signet XK50 (AT1100), three Hadcock GH228s in various states of completeness, an SME3009 II pre-Improved (the partner for the TD124), another T3, made in Russia, one of Chris Green's unipivots, a Jelco SA750D an Iskonetik SA750E, and an Air Prodigy. I think that's it! Quite a few cartridges too, but I'm not even getting into that...
A couple of the decks are already spoken for: The La Grange and one of the Linns, but most of rest will be sold over the next few months ahead of a move next year. My lovely wife, who likes playing records, hates additional 'faff', so non-optional clamps, the Rock's trough and parallel-tracking arms are likely to seal the fate of any deck that uses them!
Unless one of the others surprises me along the way, the intention is to get down to two or three of the rebuilt decks, the Bardo, either the remaining Linn or the Roksan, and the '1210GR, for extended comparisons. I doubt I'll get down to less than three in the end!
The only decks I haven't owned that I'd still be interested to hear and use at home are the various Well-Tempered Turntables, the Nottinghams- probably the Ace Spacedeck- and the Garrard 401. The only separate arms I intend to keep are the Supatracs and probably the '750E.