£26 for the steel??? You was ripped orf mate. Last batch we made worked out at £14 per pair for steel, and they had tree sliders as well. Andersons Scrappy in Ripon, 2x5.6m length of 80x40 box, 3x5.6m lengths of 42.4 thick walled tube - all surplus construction stuff weighed in by builders for scrap value, £45 the lot and we made 3 pairs of sliders with tree bars, flogged for £90 a pair on fleabay
Steel will cost me nothing, galv will cost me whatever a pack of beers is (get it thrown in with someone elses load if you talk to the bright end boys).