The "short" list of things to consider before buying a site

I'm new to site flipping and I was trying to figure out how to evaluate a site so as not to get burned. This is what I gathered while researching. When I was done and reading through it all I though "hey, maybe someone else would find this short list helpful". This really ain't the shortest list though.

Link: Site Flipping Tutorial
Major points:
The thread that started it all.
Good overview; not intended as "point and click" instructions.
Breakdown of the types of investments by price range.
More than just how to pick a site.

Link: How to Avoid Getting Scammed (read before it's too late!)
Major points:
1. If it seems too good to be true then it probably is!
2. Traffic and revenue don't seem to be in correlation.
3. Seller unwilling to disclose (enough) statistics.
4. Seller's got no reputation or even worse - bad reputation.
5. Unprofessional listing copy.
6. Price too low.
7. Seller demands payment via unsafe/dodgy channels.

Link: Guest Post: 7 Things to Look Out for When Buying a Website (Flippa blog)
Major points:
1. History of the Website
2. Revenue Streams
3. Revenue Trends
4. Traffic Quality
5. Replication Possibilities
6. Time and Expertise Needed to Maintain the Website
7. Accuracy of Provided Figures

Link: What Are The First Things You Check On An Auction
Major points:
Any improvements possible without outsourcing (in my case, design)
Any outsource worthy improvements possible (long term flip)
Domain name (English or not. Product or not.) (brandable? short? easy to remember?)
Historic revenue and trends
Possibilities of increasing revenue
Price
Revenue
Search engine rankings and pr
Sustainability of revenue
The site itself (Open it in browser, view ad placements and see where you can increase revenue)
Traffic (Search Engish or not. USA/Canada or not)

Link: Things to Look for When Buying Sites
Major points:
Consistent and scalable traffic that has been monetized
Maintenance
Verified Owner
Snatch it up!
Help someone

Link: Time consuming web purchase's...
Major points:
Neat tricks to find profitable and quick purchases/turn arounds.
Buy sites below their market value so even if you don't touch the site you will be in profit.
Don't waste time on tasks that won't directly increase the value of the site (either actual or perceived).
Don't be afraid to negotiate and make purchases based on YOUR terms, not the seller's.

Link: Google Analytics - be careful with it!
Major points:
If the Google Analytics and Google Adwords accounts aren't linked a seller can easily run paid traffic to their site, yet claim that the traffic comes from search engines making the site look worth more.
It is extremely important to take a closer look into SE rankings.

Link: (question) site not verified by seller
Major points:
Why this is and is not a problem and some tips.

Link: Assessing a website for sale
Major points:
Specifically about website directories.
There is money to be made here even with their increase in popularity.
Lots of opinions.

Link: Non-Established Sites Flip Bad Now?
Major points:
Thread has to do with new sites, non-established sites, turnkey sites, whatever you want to call them.
Getting harder to make money at unless doing it over the long term.
Lots of back and forth on this one.

Link: Opinions on PDF Search Engine sites?
Major points:
Depends on where the traffic is comming from.
Possibility of getting de-indexed.

Link: Buying Amazon Store Sites?
Major points:
These types of sites are available.
They can be profitable.