I was thinking of baby stuff prices today.
We just bought a reversible car seat to accommodate our growing baby, he has outgrown the rear-facing travel system seat we had for his infancy. It was nigh $300, and like most car seats looks like it was engineered by the legal department and then sent to the crap-accessories-that-attract-moms-but-don't-actually-work department. God I hate car seats, what a profiteering racket.
We also bought an Osprey Poco Plus frame pack papoose. This had an astonishing price tag, but it's a quality piece of equipment. This was also near $300 at REI. It was an impulse purchase but I didn't mind paying it. It's been great. I could easily see it standing up to everyday use for a decade by a growing young family. There's only one feature I don't like, and that's when you undo the buckles for the sunshade, they spring up past baby's eyeballs.
There are some balance bikes that are in this realm of price ($200 or even more). They are generally made in Yurp by small companies (or at least small brands) that either have a whole line of premium kiddie bikes or express a philosophy about how things should be. There's even a $300 bike on the market with rear suspension! However below that there are also a ton of quality bikes in the sub $150 range, and perhaps from brands you might recognize better, including Haro, GT, Strider, Burley, Specialized. It does seem as though anything decent is going to come in north of $100.
How much is too much for you? I think I'm pretty ok with $150.