A frame with a title is definitely worth at least $125 more.
I've recently purchased -
1977 750 K complete bike, not running, (exhaust rusted) with no title
1978 750 F complete bike, not running, minus a few goodies with no title
1977 750 K frame with title
1878 750 K frame with title
I paid $100 bucks for each. If the complete bikes had titles, I would have paid around $300-$500 for them. Actually the guy wanted $400 for the 77 complete bike, but let me have it for $100 when he couldn't find the title.
One day I hope to have one complete bike out of this mess. If I'm lucky two or a lot of parts to sell....