In Firefox 3.5 looks very bad.
True, now is much better than before.
I just found this website
Check Browser Compatibility, Cross Platform Browser Test - Browsershots -Browsershots makes screenshots of your web design in different browsers. It is a free open-source online service created by Johann C. Rocholl. When you submit your web address, it will be added to the job queue. A number of distributed computers will open your website in their browser. Then they will make screenshots and upload them to the central server here.
Cool, although in the 'proxies' menu, there is a proxy listed SchoolVIP.Info, and it's a SEDO parking page not a proxy.. That makes your sites' quality lower..
And before doing paid submissions I would hope to get a decent Alexa ranking and decent daily traffic to show to buyers
Although it's possible I've missed some traffic from people typing 'Proxy.com' instead of 'ProxB.Com'...
But yeah, some tips.. Before your active proxy domains expire redirect them to the list and than you'll get some free traffic and at least 10% will be returning which is better than just let it expire and do nothing