I don't actually think it's a rocketeer, but it's close in vintage and look and I'm sure it's worth the $25. The reason I'm unsure about this one is it doesn't look to me like the top opens, but it's hard to tell. My idea of them is that they are beige and this guy looks green/gray to me. If this link doesn't work go into ebay and just search Rocketeer sewing machine.
Here's one for sure:
http://cgi.ebay.com/SINGER-500-ROCKE...#ht_499wt_1154