It is definitely worth it to patch tubes from an economic standpoint... Like others here I buy a box of 100 Rema patches and the little can of glue (I suppose it's 8 oz.) at BikeToolsEtc. (Great vendor, by the way).

I figure my cost per repair is something around 17 cents per puncture. I live in goathead country, so the cost of new tubes can add up! I've found Rema patches & glue to be extremely reliable. The only glueless patches I will even consider using is Park's GP2 - and I don't have perfect luck with them.

I can patch a tube 6 or 7 times with Rema's before I even consider tossing it. Even then, it's more of aesthetic thing; the repairs are probably as durable as the rest of the tube.

Remember Rema and BikeToolsEtc. - I don't get any commission on this. Just want to share my positive experience with everyone here.