I picked up some Shimano M05 pads recently from my LBS for about £8, but I see there are loads on eBay going for as little as £3. Im guessing they are unbranded, but are they worth trying
These are mine...
eBay unbranded £2.99
https://www.ebay.co.uk/itm/Shimano-Deore-B01-B01S-E01-E01S-M05-M05S-M08-M08S-Disc-Brake-Pads/112461091764?epid=1343989305&hash=item1a2f3413b4:m:mhhPnjpE9-264asSuOX5HXw
These are mine...
eBay unbranded £2.99
https://www.ebay.co.uk/itm/Shimano-Deore-B01-B01S-E01-E01S-M05-M05S-M08-M08S-Disc-Brake-Pads/112461091764?epid=1343989305&hash=item1a2f3413b4:m:mhhPnjpE9-264asSuOX5HXw