[answerguy]

http://www.thedenverchannel.com/news/2769931/detail.html

Referring to private sales at gunshows in Colorado:

Does a dealer do them? What do they charge? Has there been any hassles?

[stevesmith7]

Last show I was at there was a guy in a separate booth doing checks for $10.
Didn't seem too busy.
Why wouldn't people just leave the area and do a legal in state transaction?

Steve

[answerguy]

According to the article that is addressed in the law.

"However, another section of the law specifically covers such "wink, wink" deals, stating that any transaction that starts in a gun show must involve a background check, even if the money and firearm are exchanged somewhere else later. That section would remain unchanged under Rose's proposal."