Set Identification from Garage Sale Score
Responding to the gallery from the original question:

Photo #1

7124-1: Flash Speeder

Photo #2

7316-1: Excavation Searcher

Photo # 3

8644-1 Street Maniac

Photo #4

4743-1: Ice Blade

Photo #5

8650-1 : Furious Slammer Racer

Photo #6

8356-1 # Jungle Monster

Photo #7

4743-1: Ice Blade

Photo #8

7315-1: Solar Explorer

Photo #9

4098-1: High Flyers

Photo #10

don't know

Photo #9

8643-1: Power Cruiser

Photo #11

7314: Recon Mech RP

Photo #12

7315-1: Solar Explorer

Photo #13

7141-1:    Naboo Fighter

Photo #14

6616-1: Rocket-Dragster

Photo #15

4587-1: Duel-Racers

Photo #16

7313: Red Planet Protector

Photo #17

7316-1: Excavation Searcher

Photo #18
7312-1: T-3 Trike

Photo #19

8650-1 : Furious Slammer Racer

Photo #20

don't know