For example, consider Amazon Hub Lockers, order pick-up boxes usually located in 3rd party retail venues such as drug/convenience stores, etc. Amazon benefits by reducing last mile delivery costs and expanding its customer base beyond those already having safe delivery locations, all without paying for dedicated locker space. The retail venues benefit from the incremental sales accompanying increased foot traffic. Depending on the relative value of these benefits, competing options available to the parties, etc. it seems reasonable that the net cash exchange could go in either direction.
This same scenario exists (at least hypothetically) for music licensing. A well-known artist knows that a film, Youtube video, etc. will benefit from use of her song, and she doesn't benefit much from the incremental exposure (or might even be hurt by overexposure). So, she can demand a significant fee for the song's use. On the other hand, a relatively unknown artist might rationally pay a film's producers to include her song due to the much needed exposure provided.
The transfer of ownership of large goods like boats also falls into this category. The owner of a desirable boat will be paid by the new owner. However, the owner of a large, unsalvageable boat likely will have to pay someone to take title due to the cost of disposal.
Labor rates for internships can be positive or negative. It's unheard of for tech companies to have unpaid software interns, but I understand it common for internships at talent agencies, PR firms, etc. to be unpaid. I've read that high school kids from wealthy families sometimes pay for the right to go to a 3rd world country and perform "volunteer" work for a couple weeks as a way to pad college applications. The variance in these labor rates is due to the difference in the benefit to the laborer vs. the value provided by the labor coupled with the relative supply/demand of laborers/jobs in each category.
Is there a name for goods/services/rights for which prices might reasonably be paid in either direction? A macroeconomic example might be interest rates, but I'm happy to limit the scope to microeconomics.
Is it relevant that the examples I've cited all are composites of individual goods/services, none of which having prices likely to vary in direction? The deal between Amazon and a retailer involves two services: (1) the retailer leasing space to Amazon for a locker and (2) Amazon providing the retailer with a stream of incremental foot traffic. It is only that the values of these two components can vary relative to each other that results in a composite price with varying net cash direction.
It also strikes me that all transactions might theoretically have this property, although with varying likelihoods. For example, every item in my home either has value if sold on eBay/Craigslist or is worth so little that I would have to pay the trash hauler to take it away. Perhaps the term I am seeking expresses a matter of degree vs. kind?