My current For trade pics: http://www.flickr.com/photos/29582732@N06/sets/

I am currently looking to trade for (or buy) graded cards with no qualifiers that are in the top 5% or 10% of the graded population for that card (minimum pop of 100 unless BGS 10 but I will make exceptions). I may consider a higher % if there are no cards above that grade as well.  Mainly looking for BGS & PSA, but will consider SGC as well.  *I am especially looking for low pop Pristine's (BGS 10/SGC 100), especially BGS w/ quad 10 subs.* I will also take scratched graded cards. My requirements & examples:

*If total graded population= less than 2500 - grade must represent no more than 10% its population. (Modern cards must also be more scarce than the set average for that condition). Example: 1985 Topps John Elway
PSA Population:
BGS Population:

Total Combined Population: 1509   I would consider PSA 10 or BGS 9.5 (0.5%). May consider PSA 9/BGS 9 (still in top 8.5%)

*If total population: 2501-5000 -  grade must represent no more than 5% of its population. Example: 1986-87 Fleer Magic Johnson
PSA Population:
BGS Population:
Total Combined Population: 2605   I would consider PSA 10 or BGS 9.5 (4.5%)

*If total population: >5000 - grade must represent no more than 5% and must be a star card.  Example: 1989 UD Ken Griffey Jr.
PSA Population:
BGS Population:
Total Combined Population: 86135  I would consider BGS 10 (0.8%)  and PSA 10 or BGS 9.5 (4.2%)
 

What I look for & how I trade (mid and high end):
I trade by sell value mainly, but also trends,"like factor", comparable cards, etc. 

Preference is on graded cards (no BCCG or off brands) and rare inserts.  I will trade for unopened cards as well as authenticated memorabilia, but no sets. I typically won't do non-rare raw cards. No preferences on teams or players as long as they fall under these guidelines.
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Low End/PC/Set Wants:

I will trade by any method on low end, but it needs to be worth the postage. Currently working on a Magic Johnson super collection. I will generally only trade my lower end stuff for PC wants or it also makes for a nice "throw in" to sweeten a deal. I collect Todd Christiansen (former Raider), Jay Howell (former Dodger/A/Yankee), Rajon Rondo and most HOFers as well for my PC. Also players from the 1955 Brooklyn Dodgers.

Set Wants - 1950's Red Man Tobacco Baseball (w/tabs), 1964 Topps Giants Baseball (any)
1980-81 Topps Basketball - need:
# 1 3 / 181 / 258 Roundfield / Erving / Brewer 
# 101 60 / 122 / 48 Walker / Birdsong / Mengett 
# 116 105 / 123 / 54 Barry / Lacey / Carr 
# 125 119 / 72 / 249 Johnson / Issel / Kupchak 
# 128 124 / 234 / 26 Ford TL / Dantley TL / Johnson 
# 131 132 / 93 / 126 Abdul-Jabbar / Parish / Burlseon 
# 140 151 / 133 / 207 Moncrief / Abdul-Jabbar / Gale 
# 146 162 / 174 / 139 Kolff / Erving / Magic 
# 148 166 / 13 / 179 Cartwright / Johnson / Collins 
# 159 192 / 263 / 107 Kelley / Jones / Malone 
# 160 201 / 134 / 180 Owens / Nixon / Dawkins 
# 161 208 / 53 / 223 Gervin / Walker / Williams 
# 175 251 / 67 / 5 Unseld / Huston / Drew 
# 2 7 / 185 / 92 Malone / Mix / Parish TL 
# 30 108 / 176 / 87 Murphy / Cheeks / Kelser 
# 48 143 / 30 / 232 Johnson / Bird / Sikma 
# 6 34 Larry Bird / 174 Julius Erving TL / 139 Magic Johnson
# 66 178 Cheeks/18 Magic/237 Boone
# 68 189 Alvan Adams / 163 Bill Cartwright TL / Dan Issel
# 77 228 / 205 / 203 Brown / Kenon / Washington 
# 85 246 / 41 / 128 Dandridge / Theus / King 
# 88 257 / 144 / 89 Hayes / Johnson / McAdoo 
# 94 34 / 164 / 23 Bird / Cartwright / Drew