Hi bellarinelawns,
Honestly the new sloper style Briggs engines for $269 are pretty good value for money.
Alternatively you can buy a Chonda for around the mid one hundred figure like this one,
http://www.ebay.com.au/itm/5-5HP-Petrol-Engine-OHV-Stationary-Motor-4-Stroke-Horizontal-Shaft-Recoil-Start-/261416433572?hash=item3cdda237a4:g:CeUAAOSwDk5T1FaR
or this one is even cheaper,
http://www.ebay.com.au/itm/5-5HP-Petrol-Engine-OHV-Stationary-Motor-Horizontal-Shaft-Replacement-4-stroke/131655785893?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20140106155344%26meid%3Dcacb1dc3e0044e30bb0e5656e0a4ebbd%26pid%3D100005%26rk%3D2%26rkt%3D2%26mehot%3Dpp%26sd%3D261416433572
Most of these are very reliable power plants if you do the general maintenance like change oil regularly etc.
Cheers,
BB