Should I buy MarketPress?

I am constructing a WP site for a new client. They have multiple (500+) audio recordings of speakers at events. They want to sell CD's (that would be shipped) and MP3 files (downloadable after successful receipt of payment) through a PayPal gateway. Can MarketPress handle this easily?

I don't want to be too complicated, but the combination of downloadable (after payment) MP3s and CD's for shipping seems to be outside the realm of some of the other plugins.

Thanks for your feedback

Chris