MBox is a small, self-contained weather sensing device that delivers barometric pressure, temperature, humidity and dew point information with high accuracy. With the available ASCOM-Driver this data can be made available to any application that supports the ASCOM Observing Condition specification.
It features a Micro-USB port and comes in a small, handy enclosure.
I've used this to record weather data whilst imaging.
I've now got other sources of that data, so this is surplus to requirements.
They sell for 80 Swiss francs new.
I'll sell this one for $80AUD including postage.
Software and ASCOM driver can be downloaded from manufacturer's website.
Link