These tri grip weights are alright. Loads of people sell them on eBay. I shopped around and bought different weight denominations from different sellers as I got them a bit cheaper that way. You'll need at least 1 set of 20s (I got 3) 10s, 5s, 2.5s, 1.25s and I also bought a set of fractional plates to give me 1, 0.5 and 0.25.
And of course a bench and squat rack. I won't link those as there are loads on eBay, different prices. Depends how much room you have. The big power racks are great but take up a lot of room.