Performance of multi vendor marketpress

Hello,

I wish you a successful and prosperous 2013.

I have bought Marketpress and I plan to establish a multi vendor makretpress platform, like ebay for immediate sales. It will be a website where people can sell something second handand I would assume that I will have mid to long term more than 5-10K sellers on the platform. Is this possible with Marketpress when setting up the multi site functionality or will I have performance issues?

Many thanks for your feedback

Walter