CBRE Global Investors on behalf of a Berlin doctors pension fund is under offer to buy 7, 8 and 10 Brindleyplace in Birmingham from Tritax for around £130m, a 6% yield.
The RBS-let offices total 295,000 sq ft across three buildings.
The nationalised bank pays £7.5m in rent on a lease expiring in 2029.
GVA is advising on the sale.