I don't like liner locks if anything other than general utility is in the offing. I'd rather have a lockback if I'm limited to an inexpensive folder.
If you aren't going to do a lot of abusive stuff with it, take a look at the Kabar Dozier Folding Hunter With Thumb Notch -
http://www.amazon.com/KA-BAR-Dozier...8&qid=1398646021&sr=8-6&keywords=kabar+dozier
-- image at
http://www.kabar.com/knives/detail/45
My wife is the proverbial absent minded professor, and used to sow the world with Spyderco Enduras - but none of them ever sprouted or bore fruit, unfortunately. When the Kabar/Dozier knife first appeared I bought one to look at and test and it did well, so I bought half a dozen of them. And I told her she could lose a $20 knife just as well as she could a more expensive one. She whined a little at first
but soon grew to like the Kabars - especially since I could keep her 'reserves' clean and sharp and all she had to do was pick up another one when the one she was carrying got dull and gummed up with tape stickum.
We're still working with that original half dozen - I think it's down to four now though.