everyyear 8 or 9 November if it is falls on weekend, it will be a popular date for weddings.
some photographers and videographer are not keen to accept booking very far away, cos their intend to raise their price in near future. so it maybe 20~30% difference if he shoot your wedding compare to those booking him only 2 or 3 months in advance.
you should worry about those offer cheap and their price does not change over the years, this shows that their works and style does not evolve or improve much.
if you don't really keen on spending too much on photo and video, than just take whatever you want, bear in mind that the quality of works do come with a price tag.
do note you spend lot of money, efforts and time to prepare your wedding, and these two are the best things to record everything happens during your wedding, so it does make sense to allocate a decent budget on photography and videography.
Hope this help.