The value of the domain name, would depend on how much could be made from said domain.
It's a fairly good name, the s hurts it's some I think. As was said you will send some traffic to engineer.net, the .net is ok and works but .com works even better.
The name it's self has alot going for it, but it's not a super stand out domain to me. I'll say 5k to 10k, but it would be better to build it then sell I think. Then I'm sure you could get a better price then, but I do like the name but other ones are better.