| Lets do it this way.
If i was in a position of a cash buyer and had 10000-12000
then.....
1) a 996sps on a y plate say £8000 with ohlins and a few bits
2) a 996r on y/51 plate. In tip top condition £11,- 12000. Get a bargain a bit tatty for £9000.... poss good investment good bike.
3) I suspect £10000 gets you an 04 999s new. Good bike, 2 years of warranty but old spec and will lose £2000 depreciation.
4) 998R as good as it gets, but possibly £14000 for a good one, although you may not lose too much money. | 
Hybrid Mode
