I'd avoid an ebay-like site and order from an actual retailer. It makes warranty issues a lot smoother if you end up with a bad part. Some manufacturers will consider the auction-bought parts as second hand.
that said, here's my rough suggestion:
AMD Phenom II X6 1075t
AS Rock 870 Extreme 3 motherboard
8 GB DDR3-1600 RAM
80-120GB SSD using sandforce controller (Mushkin, G.Skill, OCZ)
Samsung Spinpoint f4 2 TB 5400 RPM HD as a storage drive
blue ray burner.
case with at least 2 120mm fans
450-600W PSU from reliable company