| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.425 | US $5.23 | SkaraborgJohan (51) Shipping US $4.80 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.629 | US $13.21 | AbsoluteBrick (180) Shipping US $12.59 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.649 | N/A | Brickshaw (235) Request a Shipping Quote Minimum Order US $3.25 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.654 | US $5.46 | SkaraborgJohan (51) Shipping US $4.80 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 6 | US $0.688 | US $5.29 | Bremer Bricks (199) Shipping US $4.60 Minimum Order US $4.47 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | US $0.711 | US $5.21 | Flying Box (387) Shipping US $4.50 Minimum Order US $5.00 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | US $0.739 | US $5.69 | Pop's Block Shop (1136) Shipping ~US $4.95 Minimum Order US $0.94 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 19 | US $0.753 | US $6.83 | BrickSick OLX / BLIK (29) Shipping US $6.08 |
| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.80 | US $5.40 | Penguins and plastic (166) Shipping US $4.60 Minimum Order US $7.50 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.808 | US $6.80 | Brick Counters Bazaar (166) Shipping US $5.99 Minimum Order US $5.00 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.812 | US $6.80 | Studbee (636) Shipping US $5.99 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.816 | US $17.37 | Noosa Brick Paradise (24) Shipping US $16.55 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | US $0.819 | US $6.31 | Danny-R Sale (163) Shipping ~US $5.49 Minimum Order US $2.00 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | US $0.827 | US $5.70 | Coren’s Brick Emporium (169) Shipping US $4.87 Minimum Order US $1.08 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 8 | US $0.833 | US $9.97 | ubertoys.eu (484) Shipping US $9.14 Minimum Order US $1.08 |
| Used (Good) | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.842 | N/A | bartbart's (276) Request a Shipping Quote Minimum Order US $3.66 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 11 | US $0.848 | US $11.66 | Brickslan (84) Shipping US $10.82 Minimum Order US $5.41 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 8 | US $0.855 | US $9.04 | 1 Brick.Bazaar (1104) Shipping US $8.18 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 14 | US $0.865 | N/A | Baarlo Bricks (42) Request a Shipping Quote |
| New | Red String with Coupling Points and End Studs 1 x 21 | 14 | US $0.865 | N/A | Parkstad bricks (210) Request a Shipping Quote |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.865 | N/A | LeVin's World (381) Request a Shipping Quote Minimum Order US $1.08 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | US $0.87 | US $10.06 | LoTi Toys (53) Shipping US $9.19 Minimum Order US $5.41 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 8 | US $0.872 | US $6.10 | KOPEC KOSTEK (RB-Bricks) (156) Shipping US $5.23 Minimum Order US $13.08 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 11 | US $0.877 | US $5.49 | Vintage Brickworks (375) Shipping US $4.62 Minimum Order US $4.62 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | US $0.881 | N/A | NI Bricks (270) Request a Shipping Quote |
| New | Red String with Coupling Points and End Studs 1 x 21 | 10 | US $0.892 | US $9.49 | Peup-Peup Bricks (79) Shipping US $8.60 Minimum Order US $5.41 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 11 | US $0.894 | N/A | The Little Brick Shed (3) Request a Shipping Quote |
| New | Red String with Coupling Points and End Studs 1 x 21 | 1 | US $0.90 | US $5.14 | New England Bricks (29) Shipping ~US $4.24 Minimum Order US $2.00 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 2 | US $0.901 | US $17.94 | Studs & Bricks (52) Shipping US $17.04 Minimum Order US $2.70 |
| New | Red String with Coupling Points and End Studs 1 x 21 | 3 | US $0.904 | US $8.04 | Charlie's Brick Shop (4) Shipping US $7.14 |