Since you need to get a new copy, I'd strongly suggest finding the Game of the Year Edition.
If you aren't aware already, this will give you access to some excellent mods (as well as two very good expansions).
Prices at [url="http://www.amazon.com/Elder-Scrolls-Morrowind-Game-Year/dp/B0000CNUUP"]Amazon[/url] range from around $11 to $28 (US). It's really not at all a bad deal.
Or, even better, go for their "Better Together" package which gives you Morrowind GOTY
and Baldur's Gate Two: The Ultimate Collection
for $30.... amazing value there!