Ok so I just got full guthans and teasted it out on the tzhaar monsters (not fight caves). I was there for a while, maybe half an hour killing them with a few 10sec breaks. When I had full health, I'd unequip my spear and use my whip and dragon sq. After I got bored doing them, my guthan items were still at 100 (not fully). So not thinking it would cost much to get them repaired, I went to bob in lumby. I used the Guthan body (100) on bob, it would cost 4500+ gp. Now when it said that, I thought it meant to repair the whole set. When I got it repaired, it only repaired the platebody! How can 4500gp repair a platebody when it's only 100? Barrow Bodys cost 90k to repair fully from 0. Something is not right in the calculation... :evil:

Your armour says 100, but it may be 98 or 97. I think it may just be rounded to the nearest: 25, 50, 75 or 100.

Hmm, that could be it. I also noticed that my spear costed less, because I used it less than the others.