how expensive is liquid nitrogen

{"cid":"91221752","title":"PSA Nitrogen Generator 99.999% Purity for Laser Cutting","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/e7\/c1\/d4913c2b366935b3f039fdc268eb-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"GASPU","Model Number":"MD","Minimum Order Quantity":"1set","Delivery Time":"45work days","Certification":"CE","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"8set\/month","Packaging Details":"Plywood or other type","Warranty":"One Year","Usage":"Nitrogen","Condition":"New","Voltage":"220v\/380v\/50-60hz","Weight":"Actual Weight)","Purity":"99.99%-99.9995%","Power(w)":"Actual Power)","Color":"customized"}}

{"cid":"91201138","title":"DJL High Quality Seafood Iqf Machine \/ Industrial Freezer Cryogenic Freezer","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/31\/58\/33fe9542bcc579aee79cffdf33d0-200x200-1.jpg","attrs":{"Price":"negotiable","Brand Name":"DJL","Model Number":"DJL-QFL-1218","Minimum Order Quantity":"1 SET","Delivery Time":"30-45 working days","Place of Origin":"Guangdong, China","Packaging Details":"sea shippment package","Supply Ability":"10 Set\/Sets per Year","Certification":"ISO9001,CE","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, MoneyGram","Material":"SUS 304","Working temperature":"-140\u2103","Temperature control precision":"minus 20\u2103","Temperature uniformity":"minus 6\u2103","Cooling rate":"equal to 20\u2103\/min","Heating rate":"equal to 5\u2103\/min","Application":"seafood, meat"}}