It depends on a couple of factors. Do you need to sell it right away? If so, you should be able to get $150 very easily.
If you can get the right buyer and that means waiting until he/she finds your domain name you should be able to get a lot more.
The last domain I sold was for $4000 :sold: and it was a 3 word domain with the first word being 'the'.
Based on that if it were me I would try to get at least $500 for it, but as I mentioned you may be waiting a while to get the right buyer.
So, why not put it up for a 14 day auction with a reserve of $150 and see if you can get more.