These work with a T28 cable (around £5) and the logger software (provided)

The account set up fee is £2.50

And thereafter each log is priced as follows:

10-50 Logs £4 a log
50-100 Logs £3.50 a log
100+ Email me

If you need less than 10 logs you can email them to me and i will calculate them on my account for £7 each

If you find cheaper anywhere, provide evidence and we will match or beat