You can pick up used aka estate pipes at a substantial discount if you shop around. Antique Shops and garage sales are a good place to start.

You can clean and sanitize one and get into really good shape and eliminate most ghosting of flavors. There are several methods but the salt treatment is best for cleaning bowls. You fill the bowl with un-iodized salt. You then get an eyedropper and fill it with PGA or vodka. Slowly drop it into the bowl until it is full to the top. Let it sit overnight, empty it and scrub the bowl with a paper towel. Take care to not get any booze on the finish of the pipe. Use baking soda to clean the stem. This usually gets any ghosting out. If there is still ghosting you can smoke a few bowls of burley through it. That eliminates any ghosting...Five Brothers tobacco is recommended for this by many folks I've talked to.

You can buff and wax the outside of the bowl and make it look almost brand new.

Lots of folks use e-bay to buy estate pipes...I'd rather deal with folks I know though.