Used Items for Sale, Rent or Free
The Institute participates (along with Princeton University) in a bicycle sharing program, Zagster. Bicycles linked to this program are located on the Institute campus in several places, including in front of Bloomberg Hall, and near building A, near handicapped parking, by the construction area. There are also bicycles located in the housing complex. Locking and unlocking bikes borrowed through the bike share is managed by an app on a smartphone. To sign up with the program click the Bike Share at Princeton option, and join using the link at the top right of the page. Membership in the Princeton bike share program is open to all members of the public, so family, friends, colleagues and guests can also join. There are three different membership plans. The most expensive costs $20 (a one time fee) and with that type, rides of less than 2 hours are free of charge. Trips longer than two hours are charged at $2 per hour. Other plans include a weekend only option, and renting by the hour without a one-time sign up fee (in which case the charge is $2 per hour for every ride.)
If you prefer to own your own bicycle, but want to obtain one inexpensively, it is possible to do that while supporting a local charity. The Trenton Bike Exchange is a not-for-profit bike shop that keeps bikes out of the garbage, encourages sustainable transportation, and supports the local community. The Bike Exchange is run by a local bicycle club, and it profits to the local Boys and Girls club. The bike shop where one can buy a good used bicycle is operated out of a store front in a shopping mall on the border of Lawrenceville and Trenton. Full details including location details and store hours can be viewed on the website or inquiries can be sent to info@BikeExchangeNJ.org. At the end of your stay, if you have a bicycle that you own and can't take with you, bicycles donated to the Bike Exchange are considered a charitable donation, and are tax-deductible.
One of the bicycle stores in downtown Princeton, Kopp's Cycle, at 38 Spring St., also sells used as well as new bicycles. The least expensive used bicycle at Kopps would is likely to run in price at over $100, but these are likely to be high quality used bicycles. Kopp's sells new bicycles as well. Less expensive new bicycles can also be purchased at Walmart or Target, located in the Nassau Park Mall, near Wegman's (which you can get to using the IAS shuttle.)
Garage/Yard Sales - The website accessed via this link posts listings of local Garage Sales/Yard Sales. These are sales held at someone's home. Typically the homeowner organizes the sale, offering to sell used household items, furniture and clothing. Prices at these sales are usually quite inexpensive.
This site is designed to facilitate the free exchange of used items in the interest of keeping them out of landfills. (Recycle and Re-use!) In order to use this service you have to create an account, and then you can join a local group to find items that are posted. There is a local Princeton group, and there is also a Mercer County group that includes things that may be offered in some of the adjoining communities. Everything on this site is being offered for free.
Princeton Packet Classifieds
The Princeton Packet is one of two local Princeton Newspapers. (The other paper, the Town Topics, also has classified advertisements, and you may want to check a printed copy of the paper to find items for sale, but the Town Topics ads are not posted on the web.) You can access the classified advertisements section for the Princeton Packet on the web through the link above. Among the classified ads there are often items for sale (such as cars, bicycles or furniture) and you will also find notices about Garage Sales or Yard Sales (usually held at someone's home on a Saturday morning) and there you may find all sorts of used household items for sale. Yard Sales and Garage Sales usually happen in the spring and fall when the weather is good.
Princeton Online Classifieds
This is a commercial website that includes a lot of information about businesses in the Princeton area, and it also has a section for classified ads. Posting ads on this website is free. Most of the things posted are from the local area.