Celeron is the last line of CPUs from Intel to make the transition from Ivy Bridge to the Haswell micro-architecture.
Here are the two latest models, or rather the three latest, since one of them comes in two versions, a normal and a low-power iteration.
Said chip is called Celeron G1820 and is a dual-core unit with 2.7 GHz clock frequency, 2 MB cache memory, DDR3-1333 memory support and a TDP of 54W.
According to ShopBLT, the price of the chip is around $47 / €47.
The same goes for the Celeron G1820T, which trades performance (2.4 GHz clock) for power efficiency (35W TDP).
That leaves the Celeron G1830, a dual-core 2.8 GHz CPU with 2 MB cache, DDR3-1333 memory and, again, 54W TDP. Its price is $59 / €59.
All three have GPUs with 1050 MHz frequency. They are OEM parts, so you won't find them for sale in retail, standalone.