Lopez had a good selection in whilst we were there recently and also didn't seem as expensive as last year.
If you go to the El Real Industrial Estate, there are also a couple of places there.
Also here, if you take the first "entrance" ie the lane next to the car dealership and go up the road with the bathroom place on your right there is an outlet which as you drive past looks as though it just sells electrical goods ie washing machines.
If you go in here it is bigger than you think and sells everything you can think of including bikes, and prices aren't too bad - you can negotiate. It doesn't have a name displayed. Its worth going to take a look.
There is also a very good B&Q type store (forget the name of this one) as you come from Murcia to Vera on the E15 on your right just before the Vera exit.
Of course, if you're by Almeria or Murcia you've got the Carrefours, Leroy Merlin or Eroski at Cartagena.