Look for a clean one owner Rega P3. Be sure it has the original box for safe shipping and resale value later on if you decide to move up the line.
The Rega has a great aftermarket upgrade path that will definitely improve the sound with each step of the way.
Here`s a couple ideas in the upgrade department:
Groovetracer Subplatter..the difference is so very clear right out of the box !
Rega NEO power supply...surprising what it does.
The list can go on and on as budget allows.
Buy everything 'right' ( meaning used if you can wait) and make sure to keep all the factory boxes, that way you could even sell off each item if you wanted and not lose much at all or you could even make a couple dollars in the end and have fun along the way.