That seems awfully expensive! Usually the national shows are about that price. I tend not to spend more than £150 for a wedding show, and I do two or three at a time, twice a year. Sometimes the smaller venues have a good footfall of local brides getting married. The cheapest one was £50, and I got loads of weddings out of it, and decent ones too (it’s not a skanky dive, it’s quite upmarket!!).
They definitely get your name out there, and bring in more weddings than normal. I didn’t do many last year, and I have really felt it this year. Got plenty booked in for next year though.