RPE (short for Ral Partha Europe) produce and sell a huge array of classic miniatures, including Demonworld and Battletech miniatures as well as the old Heartbreaker ranges, just to give you a few examples. In their category of 28mm warband and RPG miniatures they have sorely few Goblins, only three assassin like guys (first picture), which are £2,50 each. Apart from that they produce their range of Ral Partha Fantasy armies, which include Orcs, Goblins, Tribal Orcs (inspired by African natives), Gargantuan Orcs and Trolls by Bob Olley (which I may or may not own all of…).
Depending on size you pay around £8 for 6 Goblins to £3,50 per Troll. All these categories include a lot of miniatures, so if you don’t mind a little metal, they are usable for army building. Same goes for the Heartbreaker range Ral Partha Europe sells. There are a lot Orcs and Goblins by Kev Adams and some few Forest Goblins and Trolls by Tim Prow. Most of the 12 Orcs are £2 to £3, while the Goblins (27 by Kev Adams and 3 by Tim Prow) range from £2 to £2,50.
Above you can see (from left to right) a Troll by Tim Prow, a Kev Adams Goblins and an Orc. You can find all these in RPEs online shop and follow them on Facebook. All images shown belong to RPE Miniatures and Games.