IS there a beta version of the market space?

Yes. beta-testing is already in progress and anyone can participate. In order to do that you will need to install Gem4Me messenger (links below). Than go to "Bots" section and search for Marketspace bot. Creating shops and browsing for markets is already on.
Payment services to make purchases are not there yet, but we are working on it right now.

Android https://play.google.com/store/apps/details?id=com.gemtechnologies.gem4me&hl=en_US
iOS https://itunes.apple.com/us/app/gem4me/id1032387040?mt=8
In order to use Market Space on PC one needs to install web-version of Gem4me messenger, please see instructions below: http://gem4me.com/blog/ustanovka-web-versii-messendzhera-gem4me/
Please welcome to ask your questions in TG chat in case anything is unclear to you: https://t.me/gemme_en