There is a great little GC ("Organic") on the main road into Albox from the motorway on the left next to Longos ferreteria (Which you cant miss).
It is family owned and run, so they are not too greedy with prices. E.G. stone round table and three matching benches circa 300€ delivered (depending on how good your haggling skills are!).
Consider the weather here when buying anything wooden, without diligent regular treatment everything wood tends to pull itself apart with the extreme expansion/contraction, which over time adds to the cost considerably.
For DIY, there is the large 'Bricolage' unit at the first Antas turn from H.Overa direction. Again prices seem a little negotiable, and there is plenty there for the DIY enthusiast (although it is no 'Leroy Merlin').
Happy shopping.