Ebay Help

Hey guys theres these really cheap “circus unicycles” on ebay and i was wondering if there any good just to start out on. I will only have it for like 2 months then im gonna get the Nimbus II. I was just going to get it because its cheap so i can see if i really like Unicycling so i dont waste my money if i spend $330 AUS on a Nimbus II ( inc shipping ) then dont like it. So can someone tell me if its anygood to learn on or its really crap.
Heres the link to it: http://cgi.ebay.com.au/BRAND-NEW-FUN-20-51cm-PRO-CIRCUS-UNICYCLE-BIKE-U20S_W0QQitemZ260126397658QQihZ016QQcategoryZ7298QQrdZ1QQcmdZViewItem

here is a thread talking about that unicycle