Hello & welcome aboard. It doesn't matter that you don't have a S&W M&P 15, we're a friendly bunch of people here.
was 2000 too much today?.
Four months ago, I would have said yes. that was too freaking much.
In the current panic-buy climate, maybe you did... maybe you didn't. Only you can assess whether $2K for an AR15 is worth it to you. If you're happy with it and the rifle performs to your expectations, then that's all that really matters. What I would or would not pay dosesn't mean diddly squat.
From what you described, you bought an AR15 that someone assembled from parts using a DPMS lower. A single stage trigger is most likely a stock combat trigger. The butt stock looks like it's some flavor of VLTOR. I'm not sure what the value of the green laser is.
To help you assess the value, you could give us some more details. What are the barrel details? Is it marked 5.56 or 2.23? I can't tell from the picture, but is that an A2 flat top with a carry handle attached or is that an A1 upper with an integral carry handle? Does it have a stock bolt carrier group? Is it black phosphate coated or is it silver?
How much play is there between the upper & lower. All AR's will have some play. Are there any markings on the face of the buffer? Check the staking on the BCG? Is it properly staked? Is the castle nut staked?
If you can take some close up pictures, it would help. Pictures of the lower. Separate the upper & lower, pull the BCG. Take pictures.
It's a tough time to find an AR in some geographic areas. It's an even tougher time to buy one. Remember that the panic buying/demand has overinflated AR prices across the board. What used to cost $650 - $750 six months ago now commands a peak price of $3K. It's nuts.
F.Y.I. My LGS had their last very small shipment of AR15's. Various manufacturers, new, prices ranged from $1,200 - $2,000 new. I walked in as they were putting them out on the wall. A couple hours later, they were gone.
While I was there the phone was ringing non-stop. I waited patiently with the other customers for a clerk to attend to me. I waited 45 min. Normally there are a bunch of lookers & talkers, no buyers. Since the panic started, there are just buyers.