For anyone headed to Budapest this summer, take a look at the Courtyard Budapest City Center. It is quite cheap to begin with, but as low as EUR 44 per night for several nights in the middle of high season this summer.
It is just $48 incl. all taxes and fees on marriott.com for the night of July 31st.
The hotel seems brand new and is well-rated. Budapest is a quirky city with a ton of things to do.