Well, the Boyer Saphir I linked to sold quickly, it was under $500, in superb condition (looked Mint), coated, and in a Compound with flash sync.
Thanks, everyone, for the info. Yes, I’ve changed my mind—I now want a lens with a shutter because I mainly shoot with strobes. Sorry for the confusion. I know my budget isn't enough for a decent lens, but I’m not in a hurry. If I find something decent, I’ll ask for your advice.
I notice that reasonably priced 300mm good lenses in shutters that cover 10x8 sell quite quickly. Your budget is way more than the price of a decent f4.5 lens in a shutter, just needs patience and then a swift decision.
There are options for shutters for barrel lenses, but hard to find. I've just bought a new (to me, old 1080p) video camera, specifically to show the shutter options for barrel lenses. Most people don't realise Gitzo made leaf shutter, few were probably sold outside France, I have one that front mounts on all my larger lenses. It needs a new thread to mention all the options, but I have 5 or 6 different options for my larger LF barrel lenses 12" to 20"
Ian