Look on the TwinJet website an all the netjet aircraft up for sale.
see:
Twinjet Aircraft Sales (UK) Ltd Inventory
NetJets Stock......
1995 Gulfstream GIV-SP MSN: 1275 Reg: N475QS *DEAL PENDING*
2008 Gulfstream G450 MSN: 4133 Reg: N478QS Ask: US $29,995,000.00
2005 Hawker 400XP MSN: RK-421 Reg: N145QS Ask: US $3,595,000.00
1999 Hawker 800XP MSN: 258435 Reg: CS-DNJ Ask: US $4,495,000.00
1999 Hawker 800XP MSN: 258422 Reg: CS-DNM Ask: US $4,495,000.00
1997 Hawker 800XP MSN: 258338 Reg: N838WC Ask: US $4,195,000.00
1997 Hawker 800XP MSN: 258355 Reg: N855QS Ask: US $4,195,000.00
2008 Hawker 900XP MSN: 66 Reg: N877QS Ask: US $10,995,000.00
1991 Falcon 900B MSN: 900-94 Reg: CS-DFB *DEAL PENDING*
2002 Falcon 900EX MSN: 97 Reg: CS-DFL *DEAL PENDING*
2001 Citation Excel MSN: 560-5150 Reg: N650QS Ask: US $4,495,000.00
2004 Citation Sovereign MSN: 680-0013 Reg: N346QS Ask: US $10,995,000.00
1995 Citation Ultra MSN: 560-0335 Reg: N301WC Ask: US $2,395,000.00
1998 Citation X MSN: 750-0050 Reg: N950QS Ask: US $7,695,000.00