While our recent unexpected expenses have left me truly unable to splurge for awhile on any serious photo gear, I do find myself somewhat anxious to plug a gap in my lens collection... a telephoto of more than 210mm (that's not also a bulky f/10 telescope). And roundball's increasingly excellent bird shots have been a true inspiration. But I'm afraid I can't afford something like his Canon FD 400/4. So I've been eyeing some Minolta MC/MD 300mm telephotos, mostly the MD 300/4.5, since I already have adapters for Minoltas. However, copies of those 300/4.5s seem to be somewhat rare and over US$100, which is more than I can likely justify to the household Finance Committee of One. But then I saw some info on a Minolta MD Tele-Rokkor 300 f/5.6... and for under $100. So, my question to you all is whether anyone has any experience with the MD 300/5.6 and if so, how it might compare to the 300/4.5 models. And if there are any other recommendations for a good legacy 300mm that might be had for under US$100, those ideas are welcome too. Thanks all.