There have been offers for babypram.co.uk on Sedo, so there may be a market for it. .nets are always less wanted then .com though, so I wouldn't expect that much. low to mid xxx$ seems about right.
Like babypram is available for 2000$ on Sedo. You might sell yours well for 200-250$ you might try 500$, but my guess is that you'll be stuck with it at that price.
babytowel will be harder to sell as its adwords searches are really lower. I would sell it elsewhere than a marketplace.