On average, listings lease in the $20's per square foot per year. The Gettysburg submarket is seeing a a rise in rates. In the last 3 months, the median rate increased $28 per sqft per year.
In the last 90 days, 0 listings have come on the market, which means spaces are probably leasing quickly. You'll want to be prepared to tour spaces as quick as possible. About Inf% of the available leases in the Gettysburg are subleases, so you might be able to sign a shorter term by taking over a previous lease. There aren't many listings below 2,000 square feet on the market, so finding a space for a small business might be tough.
The standard measurement for office space in this area is around 450 sqft. Most buildings in this area were built in 1950 and are Class B.