My bandmate has one the same.

I think it's a quite decent guitar and the price you've been offered sounds reasonable to me. My friend's was also a little tinny with the strings supplied so I gave him a set of Elixir Polyweb 12-53s. These are not so bright as typical strings "out of the box" but will hold their tone without deterioration for 3 or 4 times as long (they are, however, twice as expensive!). His S&P now sounds more mellow and he is very pleased with the sound. As 'Spaw said, there are a number of other fairly basic factor that can influence the sound, some of which (e.g. saddle, nut) are easy enough to adjust.

All the best,

moo