The Snap-N-Go Original has been discontinued.
This is the original Baby Trend Snap-N-Go single infant car seat carrier. The newer, cheaper, and more widely available version is the Baby Trend Snap-N-Go EX Universal stroller frame.
The difference between the two is that in the older version, some models of car seats do click in, while the EX Universal (the newer model) can be used with a wider array of car seats but not one clicks in. Another difference is that, even though performance-wise both are practically identical, the Snap-N-Go Single has been better reviewed by consumers, probably because some car seats actually snap into the Snap-N-Go and, even the ones that don't, fit more snuggly into the frame.