A store contacted me last week about purchasing the inventory of a closing store at steep discounts. The owner wanted to know if the offer was really a good deal. Here is what I recommended for her but it applies to just about any situation that involves "great deals".
1) delete everything from this spreasheet that you don't want and don't think you could sell or return to vendors within a year.
2) delete everything for which you already have ample stock
3) delete everything that is damaged in some way
4) repeat 1-3 again with brutal honesty
If the total value is still over the asking price and you can afford to drop that kind of cash at this time of year, go for it.
You always have to remember that a good deal is only a good deal if it is a good deal FOR YOU. 50% off dog food isn't a good deal for me because I don't own a dog.