We had a cheap as chips one with DD1 and found it so handy we got another ($10 at the op shop) for DD2 and use it all the time. It's a Baby Co and has literally no extra features (no toy bar, sunshade etc) but it's quite easy to rock with your foot while you are doing something and has two seating heights. They're pretty common on the second hand scene so maybe scout around at a second hand baby shop?

And BTW you can take this apart and chuck it in the wash too...Love it!