Just bought a 4 tier metal boltless shelf unit from Tekzen on the Gunlukbasi to Fethiye road (on the right hand side heading towards Fethiye, near the Fethiye end).
The size is 1524 (H) x 813 (W) x 305 (D), and the cost is TL69.90. It’s really easy to put together and, usefully, the uprights come in two pieces so that it can be assembled as one 4 tier unit, or two 2 tier units. It also comes in a 5 tier version for TL89.90.
You can find them downstairs in the store, plus they are shown on page 29 of their current special offers booklet.