I was able to find a local guy selling his equipment as he was moving locations (squat rack, platforms, barbells, training blocks, benches). Another guy was selling LB plates to convert his gym to KGs. Another guy was selling a GHD and Reverse Hyper.
The best things I've bought off of Amazon:
1. https://www.amazon.com/A2ZCare-T-Bar-Plate-Insert-Landmine/dp/B06XGWKWF4/ref=sr_1_4?ie=UTF8&qid=1521732154&sr=8-4&keywords=landmine
2. https://www.amazon.com/gp/product/B01CJHDTV8/ref=oh_aui_detailpage_o05_s00?ie=UTF8&psc=1
3. https://www.amazon.com/gp/product/B000BDLJ5G/ref=oh_aui_detailpage_o07_s01?ie=UTF8&psc=1

I also bought my dumbbells from Walmart. It looks like they have a combo dumbbell & bench deal going on- it looks like a good option!! https://www.walmart.com/ip/CAP-Strength-FID-Bench-with-150-lb-Dumbbell-Set/55121654