Updated URL and price of PyUL DAC

Author: chryss

ipython/Data_Acquisition_with_PyUL.ipynb

@@ -17,8 +17,8 @@
       "Introduction\n",
       "------------\n",
       "\n",
-      "This pages illustrates the use of the inexpensive (about \\$150) [PMD\n",
-      "USB-1208FS](http://www.measurementcomputing.com/cbicatalog/cbiproduct_new.asp?dept_id=412&pf_id=1665&mscssid=G9PDTGJV5VES9P694WLRS3JWG3J615M7)\n",
+      "This pages illustrates the use of the inexpensive (about \\$190) [PMD\n",
+      "USB-1208FS](https://www.mccdaq.com/usb-data-acquisition/USB-1208FS.aspx)\n",
       "data acquisition device from [Measurement\n",
       "Computing](http://www.measurementcomputing.com). It makes use of\n",
       "[PyUniversalLibrary](http://www.its.caltech.edu/~astraw/pyul.html), an\n",