PS3 - Buying secondhand?

[Malt_Vinegar]

Console noob here, looking to buy a PS3 for GT5 and blueray capabilities. I have seen some cheap units going on ebay, but not sure if I going to hit any pitfalls with the unit specs.

What do I need to be looking for in terms of console specification?

Are the units different in HDD size only?

 

[Malt_Vinegar]

I thought most of the problems were dry joints, and it just meant you needed to add some flux, and re-heat??

If a blu-ray/hdd goes, thats fairly simple to replace yes? Im not shy with a screwdriver/soldering iron...