OK INFECDEAD, I've gotten 12 items signed by Stan over 2 CONs in Chicago. The first time was a few years ago at Wizard World and the 2nd time was just a few months ago at C2E2. The 1st time was an absolute blast. I also got the VIP package and it was a real pleasure taking a pic with Stan and getting his sig on some of my most prized statues. Back then a sig was $50 US and getting a certificate of authenticity only cost an additional $5. The COA was a sheet of paper that stated your piece was signed by Stan.
Fast forward 2 years and the next time I saw him was at C2E2. This time around I had an entirely different experience. When I went to go pay for a signature ticket, I was asked...what will I have signed? I asked...what difference does it make what I have signed? A sig is a sig regardless of what it's on. The person selling tix said that the sig tix cost between $60-$80 depending on what I want signed. I told him I want statues signed by Stan. He told me there was an $80 charge for that. I had 4 statues I wanted signed so that would have set me back $320. I told the dude I'm getting 4 sigs. I'll pay $60 a pop. I took $240 out of my wallet, gave it to him, and told him to get me 4 tix. He took my cash, gave me a weird look, and walked to the ticket station. A few minutes later he walked back to me and handed me 4 tix. So, I was able to get my 4 statues signed for $60 a pop instead of $80. After I got them signed, a dude was there in line with a roll of foil stickers and offered certification of the sigs for $5 a pop. I paid the dude $20 and he proceeded to put 4 foil stickers right next to where Stan signed his name. These stickers now take the place of the paper certificates that were used years ago. Also, just so you know, pics of Stan signing your pieces aren't allowed. If they allowed that, there would be no need to charge peeps an additional $5 a pop for certification. As I said, the 2nd time around did leave a rather bitter taste in my mouth.
As far as value of your statues after he signs. There is no way the piece will be worth less. A certified sig by Stan does ADD value to the piece. Just keep in mind...Stan signs everything peeps pay for, so his sig isn't rare. Therefore, his sig also doesn't add a lot of value to a piece. However, if you paid between $50-$80 for his sig, you can more than likely get that back when you sell an item. Especially on a hot statue like the original Spidey COM. That sig will command a premium.
Even though I didn't enjoy the 2nd time I saw Stan as much as I did the 1st, I'll probably buy another VIP ticket for his upcoming appearance at WW this summer. This time around, I plan on getting a pic with him and my family. My 2 sons are both now old enough to know who he is and a pic with me, my wife, and both of my boys with Stan would mean a lot to me. After that, I can pretty much say my Stan experience will have come to an end. However, I'll NEVER forget the 1st time I met Stan. I felt like a little star struck kid and it was AWESOME! I hope you enjoy it as much as I did.
still haven't decided which collectible to take yet but I'm pretty much stuck between 3...my Comic Green Hulk PF base, my Spidey PF base or the Spidey Comiquette base...im also thinking which will be easiest to carry around all day!! 
Looking to get that killer pic with him signing my arm so that I can show my grandchildren one day that I met the great man and also what a great way to finish off my sleeve 
C'mon BR...she's a star!!! 
