Second-hand rugs are, like most second-hand furnishings, the most eco-friendly way to go. Look for them at antique stores, at online marketplaces like Etsy and eBay, and via local Buy Nothing groups (for freebies) or local Yard Sale groups on Facebook.  Of concern with used furnishings is, of course, bedbugs. The good news is that when it comes to rugs, bedbugs don’t prefer them to lay their eggs in except in extreme infestations. Your first tactic is that you should carefully visually inspect the rug (outside) before you bring it inside and look for the telltale signs of bedbugs like red streaks and bedbug bodies. Give it a good vacuuming (still outside) and change the vacuum bag. If you want to be extra-careful, one simple solution is to unroll the rug and leave it outside in the cold if temperatures in your area drop below 20 degrees for at least a week. Another option is to heat-treat it. Wrap the rug in plastic, and get the internal temperature up to 110 degrees for 3 hours. This will kill any bedbugs as they can’t survive at high temperatures.