If you're looking for an item in the middle of the price range, consider buying this Buti Satchel Bag. While the price is very reasonable, this piece is an easy wardrobe update. It's also worth taking a look at this Sergio Rossi Satchel Bag. This piece is ultra popular and, just as importantly, not very expensive.
If you want to treat yourself, then you won't be disappointed if you check out this Carven Satchel Bag. It's a costly but smart option.