I think you need a few more pictures and some more detail concerning what spec the car is. For instance is it leather? Heated seats/ mirrors? I can see it looks like midline display but not 100%, CD changer? MFSW? Etc....
Maybe take some pictures of any damage and a few more exterior angles and definitely some interior shots
Price wise I'm not 100% as I made am estimate on someone's car that turned out to be a long way off
Unfortunately even though you've spent some money modding it you'll never get it back, if anything it'll put some people off.
No offence intended in case it comes across like that, just trying to help