Costs of Open Access Repositories
According to her spreadsheet, the low end for set-up costs is $5,770 (CILEA) and the high end is $1,706,765 (Cambridge University). The low end for yearly maintenance is $36,000 (National University of Ireland) and the high end is $285,000 (MIT). Because Cambridge gives no annual maintenance cost, it's very high set-up cost may include annual maintenance. Kemp lists the Caltech archive but doesn't mention Caltech's finding that set-up costs are less than $1,000.
It's not clear what the different institutions are counting as part of set-up and maintenance. It would help to break out the different costs so that we know when we're comparing like with like and when we're not.
Source: Peter Suber. Costs of OA repositories. OA News (3/11/2005) [FullText]