1) I've been inspired by some great WSO's on Domain Flipping and struck on one point.
dnsaleprice dot com used to give the exact price a domain was sold for, however, I think the site doesn't exist now. Are there similar alternatives as I need screenshots to prove similar domains sold for a specified amount e.g freemp3xxx dot com was sold for £3000 and I have freemp3xxx dot net. So by adding a screenshot of the .com that sold for $3000, my domain listing for .net will hopefully make buyers think and add value according to the blueprint.
Please let me know if there is an alternative to dnsaleprice dot com as I simply want to know how much previous domains were sold for and other stats.
2) Is domain flipping still profitable and what advice would you give me as I'm new to this area?