Came across this on a random browse. JL have 20% off a wide selection of sewing machines at present. For instance, the Janome Coverpro 2000CPX is £399.20, Brother Overlocker 734DS £183.99, Janome Excel Decor 5024 (my machine
) £263.20, and loads more.
I haven't been able to find out how long the offers run for and these JL things are often just for a day, but it's worth a look if you're interested in buying.