Shop around - try
www.dolphin.co.uk, GAK etc
It probably just means that turnkey havnt been pestered enough about thier price.
Normally the NL3 rack is about 950-1000UKP in the UK.
Also if you try european dealers and find it cheaper and can prove it, I find Turnkey will generally beat the price if you ask them - They've done it for me several times even for special order items.