standalone one cell solution based on VLOOKUP
=IFERROR(ARRAYFORMULA(IF(LEN(A2:A),
IF(A2:A>2000, "More than 2000",VLOOKUP(A2:A,
{{(TRANSPOSE({{{0; "Less than 500"},
{500; "Between 500 and 1000"}},
{{1000; "Between 1000 and 1500"},
{1500; "Between 1500 and 2000"}}}))}}, 2)),)), )
=IFERROR(ARRAYFORMULA(IF(LEN(A2:A);
IF(A2:A>2000; "More than 2000";VLOOKUP(A2:A;
{{(TRANSPOSE({{{0; "Less than 500"}\
{500; "Between 500 and 1000"}}\
{{1000; "Between 1000 and 1500"}\
{1500; "Between 1500 and 2000"}}}))}}; 2));)); )