Problem is the first one I found was a 2.0 16V for £1500 - but the owner bailed out after me sending a deposit and buying a one way train ticket

The next one I've found is a 3.0 V6 taxed and tested for £3000
And another 3.0 V6 no mot or tax but with leather for £2500
Exactly what price should I be paying for one - I thought £1500 - £2000 would be plenty but there isn't many about !!
Can you let me know soon as both owners are getting back to me soon
Thanks
H