Hi Neil,
It's very hard to say an average. We have packages starting at $595 and going up. It depends upon your needs. There are many variables to take into account, like:
How many technicians you want to track with the software
What additional modules you need (if any)
Whether you need a network version
Whether you'd like to take advantage of our web add-on/customer and employee portal
Whether you'd like to use our mobile add-on
Whether you'd like to take advantage of our QuickBooks real-time module
Whether you need your data transferred from a previous program you were using
and more ..
Give us a call at 020 7617 7242 (UK) if you're interested and we'll work up a package that suits your needs and your budget.
http://www.thoughtfulsystems.co.uk/