Our Prices on our site are based on the actual cost of the product when bought.
As more stock is bought, and if the exchange rate changes the selling price will change.
That is what happened a few months back when the price of motors and drivers went up.
We normally buy motors and drivers in high volume and this normally lasts a few months, so it came as a bit of a shock to a lot of customers when prices went up so much.
This was caused by the USD exchange rate changing from $2 to the £ to $1.3 to the £.