Sorry, but what do you mean by "track in the middle of the dent"? Do you mean crack? If so, then the wheel is kaput.
If there is a tatty set on eBay for £200, then you could always buy them and get them refurbed. Should cost you no more than £100 in total to get them refurbed, providing you take off the tyres/valves and weights beforehand.
For that kinda of money, the only set's of wheels your going to get for £200-£400 will be universal / cheap quality stuff. Avoid universal wheels like the plague. There very prone to smashing.