Colt AR 15 pre ban "transitional" question

[Winchester_73]

I have a chance to acquire a Colt AR 15 pre ban rifle. The gun was purchased brand new by the owner in the early 90s. The gun has a flash suppressor but does not have a bayonet lug. SN - ST0334XX. My question is just how much less desirable are pre bans without a bayonet lug vs pre bans that have the bayonet lug? The gun is a true pre ban and I read that despite that fact, its a transitional and therefor less desirable in the market. Is this true? Anyone have any experience with this phenomenon? Are these transitional models lower in quality than the older models? Here's a pic the seller provided.
http://i733.photobucket.com/albums/ww332/357SandW/ar15trans1.jpg
http://i733.photobucket.com/albums/ww332/357SandW/ar15trans2.jpg

[Technosavant]

The only places where pre/post ban matters at all are in states that have a AWB. I can imagine that maybe as a "transitional" rifle it might be less desirable because the states with AWBs generally banned them based on having a certain number of "evil" features- the detachable magazine, protruding pistol grip, and flash suppressor might be enough to make it disallowed in AWB states.

Everywhere else, it's simply a rifle that doesn't have a bayonet lug, which isn't going to be a big deal- I don't know anybody who is going to bother making a deal out of it.