You found 57 products in Serial Adapters - £20 - £30

Keyspan USB usa-19hs Serial Adapter
0.23 Mbps, External Adapter, USB 1.1 Interface, Cabling: Serial RS-232, Cable Connectivity, For: PC, Mac Platforms
1 store offer at £27

Hewlett Packard FireConnect 2100 (PA997A) Serial Adapter
400 Mbps, Internal Adapter, PCI Interface, Cabling: IEEE 1394, Cable Connectivity, For: PC Platforms
5 store offers from £26 - £35

SIIG (NN-300012-S6) Serial Adapter
400 Mbps, Internal Adapter, PCI Interface, Cabling: IEEE 1394, Cable Connectivity, For: PC Platforms
1 store offer at £23

Belkin (F5U513) Serial Adapter
400 Mbps, Expansion Card, PC Card (Cardbus), Firewire Interface, Cabling: IEEE 1394, Cable Connectivity, For: PC Platforms
5 store offers from £22 - £28

D-link DUB-C2 Serial Adapter
480 Mbps, Expansion Card, PC Card (Cardbus) Interface, Cabling: USB, Cable Connectivity, For: PC, Mac Platforms
4 store offers from £20 - £29

Belkin (F5U235QEA) Serial Adapter
12 Mbps, External Adapter, USB 1.1 Interface, Cabling: USB, Wireless Connectivity, For: PC Platforms
3 store offers from £12 - £29

Belkin (F5U222) (F5U222UK) Serial Adapter
480 Mbps, Expansion Card, PC Card (Cardbus) Interface, Cable Connectivity, For: PC Platforms
3 store offers from £22 - £25

SIIG (NN-440012-S8) (NN440012S8) Serial Adapter
400 Mbps, Internal Adapter, PCI Interface, Cabling: IEEE 1394, Cable Connectivity, For: PC, Mac Platforms
1 store offer at £28

Belkin (F5U513EA) Serial Adapter

2 store offers from £28 - £28

Videk UB504 (25934) Serial Adapter
12 Mbps, External Adapter, PC Card (Cardbus) Interface, Cabling: USB, Cable Connectivity, For: PC Platforms
1 store offer at £25