BTW, if you don't have your child with you when you shop for a stroller, find something heavy to test it with. Good possibilities you can find around the store are cases of formula, books, or big sacks of cat litter. You want to put at least 25 lbs. in the seat for a good test. All strollers are easy to push when empty, but who really pushes an empty stroller? Go all the way around the perimeter of the store with the loaded stroller; you need to know how it handles. Any funny looks you get will be more than worth it if you avoid wasting money on a stroller that does not meet your needs.
IMO, a stroller to be used at theme parks MUST recline in some way. Kids fall asleep in their strollers at WDW; it's inevitable. Spend a bit extra to get a recline.
Of the lower-priced umbrella strollers on the market in the US, the Chicco Caddy is probably the
best buy. The Chicco London would be even better.
http://www.babyride.com/brand-chicco.html (BTW, if you have a Value City near you, you might want to call, I just saw some Londons at mine for under $30.) The stroller the earlier poster mentioned buying at
WalMart was almost certainly either a Kolcraft or a Cosco; Graco didn't make anything that fit that description until very recently, when they came out with their "Umbroller" series":
http://www.gracobaby.com/products/subcategory.asp?No=6&N=44+57&act=A20
PS: If you're worried about wheels falling off, avoid Gracos; they are the brand that most commonly has that problem. The reason for this is that they normally are packed without the wheels, and you have to attach them to the axle yourself. Most people don't do it correctly. (A stroller where you need to slip the whole wheel/brake assembly onto the vertical post should be fine, but beware of brands that want you to attach a wheel to an axle.)