I'm entering an 8 man auction league as well...no IDP but no bench either, whole roster starts. One thing you'll notice as you go looking for cheat sheets is that most are made for 10-12 man leagues. I haven't seen any FF mags or sites that give you auction cheat sheets for 8 man leagues. What this means is that the players are overvalued for your league most likely unless you have a strange salary cap. Most leagues use $100 to $200 caps.
Say for instance, your 8 man league has caps of $200 for teams. This is $1,600 total dollars to be spent among # of teams x # players on a roster compared to a cheat sheet set up for a 12 man league with the same cap, $2,400 total cap money. So when you see the standard $72 or so $$ for LT or AP that's too high. They are only worth about 2/3 of that in your league, likewise with the suggested value of every other player. So if you start with a made up cheat sheet, the multiplier for you is going to be the total $$ in your league/total $$ available for the league the sheet is geared for. It is advisable to start with a sheet that is geared for a league with similar rosters and scoring as your league at least. The IDPs might throw a wrench into things for you.
Once you have the $$ adjusted down, the next thing is to tweak your sheet as to how you have things shaking out. For example, if you Steve Smith (Car) is ranked as WR 10 and you think he's WR 5 then adjust his $$ value as such.
I think it is a good idea to see how high the first few players go for. If you see the first few guys going way over what you have as their value then you know people are way over spending. Pretty soon guys won't be able to compete with you for certain players, which will A. Cause you to get players cheaper and B. as a result keep you in a financial advantage. They overpaid for their guys. Now you are underpaying for yours so you continue to have more leverage than them with your cap.
I also think it is a good idea to nominate players that you don't want but you think others do and let them spend on them.