You will be pushing it for 2k to find an ERST that still has rear arches, some original floor, and an un knackered engine!
Seriously most cars are dogs in that price range... HOWEVER there are some bargains out there.. just check to make sure that its straight and doesnt require shed load of work... the main problem you are likely to find with cars of this age is RUST especially as its made by ford!
front and rear arches, sills, boot floor, inner wings, battery tray, fuse box, behind sunroof, a pillars, front pannel, doors, rear hatch all go rotten very easily!
Along with that is the posibility of engine problems.. mismatched parts and a general furry of DIY tuning going on under the bonnet!
apart from whats mentioned above and a few other things ive missed off these are great cars!

What im saying is BE CAREFULL please take someone whos knows what there looking SPECIFICALLY with RST's

CheeRS
Phil