What do you consider reasonably priced? The '71-73 750 Commando stand is pretty weak. If you use one, never kickstart the bike on the stand. The 850 style is a bolt on replacement and is much stronger. New, these are about $100-$115 from most of the usual suspects. Used from eBay or swap meet, you can generally pick them up for $50-$60. The weaker 750 style I would not give more than $25-$30 for a used one that is not bent or re-welded. These are only good for a complete restoration.
If you are dead set on a 750 style, PM me I probably have one out in the shop.
I have an 850 stand on my 750and while it was still new set it up on a mill and bored out the holes to 26mm for sealed ball bearings. This is mentioned in the tech digest vertion 3 chapter 4 page 8. It makes it real easy to put the bike up and won't loosen over time. norbsa