Order management system / CRM

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So we all have our e-commerce site set up, but now we need Order management software, for stock control, purchase orders, manual orders etc and we need a good CRM that all integrate together. We have been looking at different options, but most are looking 50k-100k (some PA). We have been looking at sales force (which uses a per user licence), with one of the Order Manager plug-ins available on it apps store. But even that can work out into 10k a year!

Has anyone have any recommendations for a good order management system or CRM