Hi Travelsite,
This is impossible to answer without knowing the industries in question and also the demographics of the visitors.
Eg. if you had a domain which was aimed at young teenagers, if you redirected the traffic to an affiliate program, then you would have a very low conversion rate as they have much less (if any) disposable income, plus very unlikely to have a credit card so wouldn't be able to purchase anything, so you wouldn't make any money.
Although if you parked the same domain and the same young teenager visitors landed on your site, they are much more likely to click something on your page, which is related to your website name subject, as it wouldn't cost them anything and therefore earning you something. Plus they would be not as educated as to what a "parked" page is.
If you do decide to park them, don't use sedo as I have found (along wth others) that the average price for a click is $0.05 - $0.10 (obviously depending on topic) Try namedrive.com as I have found them much better since switching from Sedo to Namedrive
Good luck and if you want any more of my advice then feel free to ask here or PM me
