This is a Niche Site.....
for me the best...!
So my input
I see problem in compression php
you can try something in .htaccess (depending you host
AddType application/x-httpd-php5 .php
AddType application/x-httpd-php5 .html .htm
AddType application/x-httpd-php5 .js
or if you have access to php.ini
zlib.output_compression = 1
zlib.output_compression_level =""1 to 9"" ------>9 is max compression
the next i see
This page makes 32 parallelizable requests to www.metaldetectorclassifieds.com
. Increase download parallelization by distributing these requests across multiple hostnames
all your graphic on the same host....!
but is not necessairy to have CDN Try to have sub -domain like
and parallelize all your graphics on it
you can i have more (but I think max is 4 or 5 depending how many ADS like google you have)
Opinion.... you have