look at what ive been doing to my frst, ive rebuilt the engine fully and with the boring, new pistons etc etc its cost me over 1k just for that, and i sold a fully working FRST lump for £175 not long ago as i didnt wanna use it, i wanted a fresh new rebuilt lump.
but then again thats me and i dont plan on selling my car for a long time so its money well spent to me and my cars in to me for 15k plus and ive only had it 8 years

so at the end of the day you got to look at what YOU want, if you have the money to spend and you plan to keep the car for a while its worth going for.
but remember, not all s/h car are what they seem to be so you could go from bad to worse.

oh and 2k for that little lot you want done, well over the top!!

what ever money you spend on a car, you not really gunna get back as such.
also if you/anyone had there car written off tomorrow would they get back all they spent on it,......nope, so do what you feel is right.