Dycedon, Tespo's is on the way into Fethiye from Karacuhla/Camcoy way (left at the roundabout on the Dalaman/Antalya road, right at the next set of traffic lights, right at the next 2 little roundabouts) It's a long road so it must be around 1.5/2.0 miles down on your right hand side. Big building with yuck yellow trim set back from road. Efes beer is cheaper there as well - in fact most things - if you buy a crate (returnable/deposit) the beer works out around 1.60 ytl for large bottle.
Karacuhla market is also cheaper than Fethiye/Calis. Local not tourist para for fruit/veggies/household goods.
In fact, everything is cheaper in that area rather than Fethiye.
Hope this helps