I have purchased from 2014*Online multiple times and find their parts to be of acceptable quality for the price. Shipping is typically around 2-3 weeks, all orders have arrived without any missing or incorrect parts. Some fittings have material from the manufacturing process in the threading, but this can easily be removed. The only semi-major issue I have had with them is with their 3-piece ball valves. Some have required disassembly and the use of a dermal/bench grinder to machine down extraneous metal that prevents the handle from being rotated a full 90 degrees. There has also been some mild corrosion in some crevasses where fluid (probably from pacification baths) has not been correctly cleaned off.
Just an FYI about compression fittings sold by this ebay seller. They use metric inside diameters in increments of 8mm, 10mm, 12mm, 14mm...The 12mm fittings are just that, 12mm, not 12.7mm (1/2"), and as such will not fit 1/2" OD pipe. I have yet to try the 14mm fittings to see if they compress down snugly onto 1/2" OD pipe, but I doubt they will. I have purchased compression fittings form the seller mentioned by 5150 in the past, and they have been of good quality with correct imperial diameters. He is selling ex-stock from a previously owned business, as such some parts are limited or unavailable.
Edit: Spelling
Just an FYI about compression fittings sold by this ebay seller. They use metric inside diameters in increments of 8mm, 10mm, 12mm, 14mm...The 12mm fittings are just that, 12mm, not 12.7mm (1/2"), and as such will not fit 1/2" OD pipe. I have yet to try the 14mm fittings to see if they compress down snugly onto 1/2" OD pipe, but I doubt they will. I have purchased compression fittings form the seller mentioned by 5150 in the past, and they have been of good quality with correct imperial diameters. He is selling ex-stock from a previously owned business, as such some parts are limited or unavailable.
Edit: Spelling