With the $3 lists on their way, hopefully, here's a compilation of Win Rate With/Without data from CouncilRoom.com, along with a more subjective list of overrated and underrated $3's based on percentage of games where the cards are gained.
WIN RATE WITH
1: Masquerade (1.05)
2: Ambassador (1.04)
3: Menagerie (1.03)
4: Warehouse (1.02)
5: Loan (1.01)
6 (tie): Fishing Village/Swindler (1.00)
8 (tie): Scheme/Steward (0.99)
10 (tie): Great Hall/Shanty Town/Trade Route/Tunnel/Wishing Well (0.98)
15 (tie): Lookout/Oasis/Oracle/Village (0.97)
19: Fortune Teller (0.95)
20 (tie): Black Market/Watchtower (0.94)
22: Develop (0.93)
23: Woodcutter (0.91)
24: Smugglers (0.89)
25: Chancellor (0.87)
26: Workshop (0.85)
WIN RATE WITHOUT
1: Ambassador (0.92)
2: Masquerade (0.93)
3: Menagerie (0.94)
4: Warehouse (0.97)
5: Loan (0.99)
6 (tie): Fishing Village/Swindler (1.00)
8 (tie): Oracle/Scheme/Wishing Well (1.01)
11 (tie): Chancellor/Fortune Teller/Lookout/Steward (1.02)
15: Trade Route (1.03)
16 (tie): Oasis/Tunnel/Watchtower (1.04)
19 (tie): Shanty Town/Woodcutter (1.05)
21 (tie): Develop/Great Hall/Workshop (1.06)
24: Village (1.07)
25: Smugglers (1.12)
26: Black Market (1.13)
DIFFERENCE (WRW - WRWO)
1 (tie): Ambassador/Masquerade (+0.12)
3: Menagerie (+0.09)
4: Warehouse (+0.05)
5: Loan (+0.02)
6 (tie): Fishing Village/Swindler (+0.00)
8: Scheme (-0.02)
9 (tie): Steward/Wishing Well (-0.03)
11: Oracle (-0.04)
12 (tie): Lookout/Trade Route (-0.05)
14: Tunnel (-0.06)
15 (tie): Fortune Teller/Oasis/Shanty Town (-0.07)
18: Great Hall (-0.08)
19 (tie): Village/Watchtower (-0.10)
21: Develop (-0.13)
22: Woodcutter (-0.14)
23: Chancellor (-0.15)
24: Black Market (-0.19)
25: Workshop (-0.21)
26: Smugglers (-0.23)
OVERRATED (High gain rates, low WRW-WRWO)
1: Black Market (67% gain rate, -0.19 WRW-WRWO)
2: Great Hall (79.7% gain rate, -0.08 WRW-WRWO)
3: Shanty Town (75.7% gain rate, -0.07 WRW-WRWO)
UNDERRATED (Low gain rates, relatively high WRW-WRWO)
1: Loan (41.3% gain rate, +0.02 WRW-WRWO)
2: Oracle (30.2% gain rate, -0.04 WRW-WRWO)
3: Wishing Well (34.1% gain rate, -0.03 WRW-WRWO)