Is This a Louden Hay Trolley?

Yes, that is what you have there. I looked on Ebay for Louden Hay Trolley Junior. There are several listings for this model, and their asking prices are from $39 to over $300 for the listings I looked at. Hay trolleys hung on overhead rails from the small wheels, with the larger pulley wheel down, and a cable would hang bales or bundles of hay below for transport using a whole system of cables through the barn that were pulled by horses or a tractor.

There is a very nice You Tube video that shows exactly how the system works Go to You Tube and search for: Hay Trolley- how does it work? Loose Hay 1930's style. It is by Cozy Cow Family Farm. The video is just over 4 min. and well worth watching.

Thanks for sharing a bit of old farm equipment !!!

There appears to be 2 models - junior & senior models.
I believe yours is the junior model and both models seem to be plentiful but of course, there will also be different models of each based on age.

You might look at eBay listings and see if you can find your exact model (based on the numbers/names shown on your trolley).
You can place a watch on any listing if you'd like to see if it sells.

Asking prices are not considered value as asking prices are just a price a seller would like to receive for their item. Only a sold item can come close to value as it shows what someone was willing to pay for the same exact item.
You will not find a sold item exactly like yours due to many factors: condition, location or pieces missing.

www.ebay.com/.../i.html?_from=R40&_trksid=p2323012...

eBay has a link to their sold listings so check out what people are paying:

www.ebay.com/.../i.html?_from=R40&_nkw=Louden+Hay...

It looks like several have sold for about $60.
You might want to think about listing it for sale on sites like Craigslist, USA4Sale or Facebook Marketplace.
You can start your price higher - $75-100 and best offer considered. According to how heavy this is you might want to think about listing it a pick up only.
You can always lower the price if no one makes an offer.

William Louden was born in 1841 and at the age of 23 was very sick and could not work in the fields so instead he created different types of machinery to help work on the farm and make it easier to do the work. He uses to sit and watch people move hay by hand from the wagon to the barn. So he invented a tool he first called a hay carrier. This would move the hay from the wagon to the barn using a system of ropes, pullies, and a trolly. He invented a large number of these and installed them in barns around Lauderdale.

Many of the farms refused to pay for these hay carrier so he went broke. Currently, you can find two different sizes of the hay carrier on eBay and they vary in prices. I would take a look to see if any of them have sold recently and checked the selling price. If not you can take an average of the asking price and start yours a bit high to see if anyone would be interested in purchasing this from you.