really don't now. I've similar and maybe better "tube" domains and I was offered 50-100 bucks for them, even tho slightly developed it would sell for 4 figures. IMHO, your domain should be around high XXX / low XXXX without being developed, just domain, but market is weird. Try GFY.com, you'll be able to get more there since there are a lot of end users
However, I'd recommend you to buy TEVS or something like that, develop it and sell it for nice money with a 500 to 1000 investment
SEDO appraisal is worthless. I did for one of my domain and it wasn't appraised even near to what other's appraised. I will never recommend you to appraise with them...