Have you guys thought about going down the affiliate marketing route? I mean develop your sites and put in affiliate links. It doesnt take that much time these days (thanks to cms) to set up a site and do a bit of SEO to get it going while you look for a buyer.
Ok you wont make millions but at least you have more control and most likely would make more than parking it.And those are just two of the benefits of going down this route. Im sure one can come up with many more.
If the domain is product-related then register with amazon affiliates and create an astore. Astore is basically amazon but with your domain name. Then do some little traffic building. I personally rate astore well above any parking service
Almost this time last year I decided to do some split testing after having made no money from parking. I parked 15 domains each with domainsponsor and voodoo and developed another 30 with affiliate marketing links,google adsense and amazon astore.
For the whole year i made a grand total of $62 from the parked websites. My total earning from the developed sites is $840. The highest percentage of the $840 came from affiliate marketing. A company paid me $120 to promote a campaign by publishing just 5 articles written by their marketing department while another paid me $35 for a banner placement. I never did anything to get these deals. They found the websites through the affiliate network and emailed me asking me if I was interested.
So i have decided to develop as many of my domains as i can.