just so you know they made 5000 of the 1979 cb750L anniversary edition. So they aren't particularly rare and most of them show up in nice condition.
Here is the thing....you didn't get a chance to ride it did you? One of the things I always point out about the DOHC cb750s is that they fixed all the shortcomings of the SOHC in terms of ride quality and packaging. Sure it looks ugly to some but most people I know who ride one comment on how "modern" it feels while still maintaining the character of the old SOHC. If you didn't ride it, then I say you didn't make the right decision because your decision was based on a half formulated opinion based on curb appeal.
However, if you really want a DOHC I wholeheartedly recommend getting a 1981-82 cb900f. They are just fantastic riding bikes that work really well, look like the superbike racers of the same era (including the spencer paint scheme) and perfectly bridge modern sporting honda with the old original superbike origins of the SOHC. I would recommend an 1100F for the 1 year only exclusivity and magnesium racing bits but the they have already inflated in price where as the 900F is 4/5ths the same bike and still fairly cheap. Also the F series supersports have a thriving community and aftermarket.