That's a good plan. I'm not sure if you've reached out to any of the resellers but there's a lot of good options. Let us know if you need help getting pointed in the right direction.
You should also consider the two main approaches that the resellers have:
- You sell the pipes to them for cash at roughly 50% of what they value each pipe at.
- You consign the pipes to them. They sell the pipes for what they get for them. (My limited experience is that the reseller tell you the normal price and the minimum price they're willing to take for each pipe.) They will then give you a percent (some are higher than others so ask around) of the net profit.
Option 1 is fast and easy but you won't get the highest return. Option 2 is the opposite, slow but higher returns.
If you really want to maximize your return you can send the pipes to reseller, see their offer, send it to another, see their offer, and continue this with as many as you're comfortable with. Again more time consuming but you can then see which reseller will give you the best return either with consigning or selling of each specific pipe.