These are great thoughts, thank you!
I always try to imagine who my audience is for the lots I sell but it's admittedly a bit grey. My prices are likely too high for dealers (20% - 40% FMV - ouch!) and the randomness of the comics I put in the lots (Marvel, DC, Indep) may appeal only to a small number of those looking to expand their collections in different directions with nice books at decent prices.
I currently have a DD lot on ebay with mostly bronze FN to VF non-keys and several early Miller issues plus the Born Again run - 50 issues total. I'm asking $365 with a Best Offer option. So far, not a ton of interest but I'm going to see what happens.
For my other lots, I'm going to break them down into smaller auctions. I'll sell the keys individually and ask FMV, but for the bulk non-keys I'll ask for a percentage of FMV. Wish me luck and thanks again for the advice!