Hi Ms. Jensen.
There's no question that some repairs are much more difficult than others. Some can require multiple parts be replaced in order to determine the problem. In such cases, one may find it easier to take the equipment into their local Sears for servicing.
If you've determined that the unit is not worth attempting to fix further, Sears carries a wonderful line of new snow throwers from which to choose from. Be aware, however, that such an item is seasonal, so you may not find inventory available for awhile.
Hopefully this addresses any of your concerns. If it hasn't, please let us know.