Do you like the bag? do you want it for your collection?
Now, if the answer to those questions are a yes:
Deals like that don't try and selectively split up a sellers batch. Just buy it if you have the funds, some space and time. Otherwise they'll pick someone that accomplishes their goal of the least hassle, and the most free space in their storage area.
Cool stuff priced fairly like this lot do GO QUICK! like before you could get an answer from us on forums. so the easiest way to see if something you like is an amazing price, just see how much shipping of a similar sized/weight item costs just in shipping if you were to purchase off ebay.
Using that- yeah, $40 canadian for the bag is nice price alone. think about shipping alone on the larger bag is likely $30USD or more (if purchased from the US and boxed) JUST for getting it to your house.
If you have kajiji locally and live in a city it's really easy to find another person who wants to buy/trade the spare ponies/playsets off you so they won't hang around and cause clutter. (locally I follow "don't be greedy, pass along my good fortune and let someone else who loves what I do get a fun find at a great price too" and sometimes I met lovely people and get to network with those in the hobby for years like me, or new to the hobby that are excited to meet me as well)