Re: Spiderman web shooter: A collaborative project. Even more 3D Print Goodness!!!
I've also had weird behavior from that site. I've gotten the 'model not available' message as well. I actually posted about it here (either on this thread or the Junkyard one). But I just went back a couple days later and completed the transaction.
But I've also gotten the weird behavior where I was on the next-to-last step, where I was about to put in billing info, and it would just stall out. Clicking the next button just wouldn't do anything. So I closed the tab and even window a few times and just kept trying and finally it worked.
That said, I would probably not try to do that if it's on the very last step, where you've already put in your PayPal info and are finalizing the transaction. Wouldn't want to get charged multiple times. Of course, it's PayPal so it probably wouldn't be hard to reverse the charge if that did happen.
I guess just sometimes their site is wonky. They probably need to upgrade their servers or something.