Easiest is to look at a package from DiveRightinScuba or Divegearexpress. They are full Bp/W set ups for $300-$380. Also, look at DeepSeaSupply and give Tobin a call (Cool_Hardware52).
If you are looking at buying it piecemeal and want high quality items (although the above are decent quality and good value) then you just need to set a budget and wait to find items on the classifieds.
When I built my set up, I got a Oxycheq doubles wing for 118.50, a Oxycheq Singles wing for $140. I have seen Halcyon wings for $150-$250 depending on how used they were and demand at the moment.
One problem when buying used has to do with shipping cost..especially the SS plate. Might be easier just to get a DGX SS plate for $75 and get free shipping.
List of items you will need for a Single Tank Bp/W
1. Back plate (Stainless Steel or Aluminum)
2. Wing (30-40lb of lift)
3. 11 ft of 2 inch webbing (might want to double this so you have extra in case you screw up)
4. D-rings, slides, belt buckles, rubber plastic slides to hold excess webbing and help secure backup lights--you can buy individually, although for your first time it is easier to buy a kit from one of the above mentioned websites
5. Crotch Strap--I get mine from Divegearexpress. They are great and a good quality.
6. Cam bands/STA--some plates require a single tank adapter, mine only use cam bands
There are a ton of videos on line about how to thread a backplate. If you are patient and don't mind waiting you can get some nice deals on line. If this was me, I would wait and look for a good deal on a quality wing (Oxycheq, Halcyon-here might be a few others, but those are the ones I want) and get the rest of the stuff new (including SS plate) from Divegearexpress.com. If you absolutely have to have your set up now....go to the first three sites I mentioned above.
